Protective case for a watch



FIG. 1 is a perspective view of a protective case for a watch showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged view of the protective case for a watch shown within the area designated as 9 in FIG. 1.

The dot-dashed broken line in FIGS. 9 shows the boundary of the enlarged view and forms no part of the claimed design. 

CLAIM The ornamental design for a protective case for a watch, as shown and described. 